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return

Recent contents Top users
  1. S

    How to replace UFH return pin valve

    Hello, I have UFH set up with a HIU in my flat. My issue is that one zone (Bedroom 2) does not heat up. All other zones working and heating as expected. Have checked the relevant thermostat, as well as the electrical actuator for the specific zone. Both look ok Checked return pin valve -...
  2. B

    Secondary return cools cylinder within 2 hours

    I'm a plumbing novice so first of all I apologise if I'm not explaining this situation correctly. I've recently renovated a house for my family to live in and we're having an issue with water not staying hot when the secondary return circuit is on. From a starting point of fully heated the...
  3. A

    UFH mixing valve bypassing hot water directly to cold return

    I have a UFH manifold from Wundatrade with a Grundfos pump. The pump feed has a mixing valve which has a hot inlet from the thermal store, and a cold inlet from the return manifold. In-between the mixing valve cold inlet and the return manifold, is a tee which returns the cold water to the...
  4. S

    Should condensing boiler still output steam when return is 47C?

    I can still see steam coming from the vent. It is -3C outside; boiler output 61C; return 47C.
    • simonm3
    • Thread
    • boiler return
    • Replies: 1
    • Forum: Boilers
  5. Robjolla

    Tee off primary Flow and Return

    Hi new to the forum here and after some advise please. I have done a garage extension and need heating in the room. I am in a town house with no Rads on the ground floor. (Underfloor heating). My boiler (not combi) is downstairs, but megaflow tank is upstairs along with rads upstairs. I have...
  6. V

    Central Heating - Blocked 22mm return pipe?

    Hello all. I've just joined, was going to post in the new members forum, but the first site generated email sent me here... I am here, as have a challenging and interesting problem, which I'll try as best to describe below keeping to the point and as short as possible, to avoid boring any of...
  7. S

    Boiler flow and return temps too low but rads arent......?

    Forums ... Old conventional non condensing combi boiler. Worcester 24i rsf. Bungalow (ceiling drop pipes) with 7 rads. I've bled rads. Attempted to balance - Got them heating up at similar times now. Boiler manual states 11 degree delta flow and return. Boiler is set to about 3/4 of max...
  8. R

    Air lock in boiler return pipe

    I have a issue which I’m assuming is an airlock in the return pipe just above the boiler. The pipes go up and over and then enter the boiler at the bottom. The boiler fires up normally but the heat doesn’t get far and the the pipes next to the boiler make like a fluffing noise. I’m not the most...
  9. J

    Secondary return issur

    Hi When secondary return pump is on theres no flow to hotwater taps but when the pump is not running water flows through tap. Any one come across this before??
  10. J

    Secondary return problem

    Need advice on secondary return issue. When secondary return pump is running no hot water flows from hot taps.when pump off the taps work. Anyone come across this before?? Appreciate any reply
  11. D

    Arranging flow/return, will it matter???

    Hi there. I’m currently basically re plumbing my downstairs having already done most of the upstairs. Valiant 35kw boiler in the loft CH F + R both exit in 22mm TEEs off to feed upstairs inside loft Otherwise F+R head straight vertically down through middle of the house (22mm) So im about...
  12. B

    Mixed UFH and Radiators: Setting Return Flow Temperature control ?

    I have a system with 14 UFH Circuits on the ground floor and 21 Radiators upstairs. We primarily use the UFH plus a few Bathroom rads and then a Rads in very cold weather. I’ve always run the system with the Boiler operating based on - Target Flow Temp setting, but am wondering if anybody has...
  13. J

    Boiler Return Temperature Control

    I have rarely if ever seen mention of this form of control being used, which Valliant, for one, have available for years, is there a reason for this?
    • John.g
    • Thread
    • boiler control return
    • Replies: 3
    • Forum: Boilers
  14. F

    Pipe sizing - Replacing a one pipe system with flow and return

    Hi, I'm a first time poster with a skill set akin to that of a competent DIY'er I guess. I'm planning on replacing a old in efficient one pipe system with a flow and return. This will be done on our recently purchased bungalow which has an oil fired boiler. Whilst I'm confident a 22mm flow and...
  15. M

    Which is flow/return

    So bit of an odd one right. I have 2 pipes, to the rad a flow/return. I cut the flow/return and capped the flow. I went to fill up the system, the water start to leak out the return. Is that normal? Is the return really the flow?
  16. Jock Spanners

    What type of non-return valve for a 22mm heating return pipe?

    Good Morning All, I've just got a customer with a heating fault from their system boiler. When they turned off their heating for the summer they found the upstairs rads were still getting warm when they heated hot water. The boiler is in the corner of the kichen with all the pipework in the...
  17. C

    Removing radiator leaving flow/return pipes open

    Hi. I am about to lay new wooden flooring and replace my skirting boards. I want a full skirting board behind my radiator but to do this I will have to remove the radiator (take it off the wall) - obviously the system has to be depressurised to do this ... my question is this ... I do not...
  18. D

    Secondary Return Advice

    I'm running a secondary return hot water system and I'd appreciate your advice please. I'm working on a long house where the furthest draw off point Is around 40m away from the unvented cylinder. There are 3 bathrooms 2 kitchens a boot room and a utility. I have installed a 28mm hot supply...
  19. A

    Purpose of a hot water return line and a check valve

    Please see the RED marked area; The Hot water service (HWS) rretun line having a Check valve what is the purpose of this valve here? also i can see a TEE in the HWS forward and Return line, it's the only thing will be available in the HWS F&R joint? What i have understood is the HWS F&R...
  20. G

    Radiator size and return to boiler temperature

    Afternoon, Recently had a new boiler fitted with new radiators, old radiators were the old steel type. The installer recommended reducing the size as the new panels are more efficient, which we were happy to do. Now, I believe that for the output of the boiler the radiators are too small/not...
    • garden4ork
    • Thread
    • boiler radiator return size
    • Replies: 8
    • Forum: Boilers
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